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W. TILTON, OF-OSHKOSH, WISCGNSIN.

Letters .Patent No. 60,581, dated April 2, 186i.

IMPROVEMENT IN SAWS.

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"ro ALLWHon rr MAY CONGERN:

Be it known that I, E. W. TILTON, of Oshkosh, in the county of Winnebago, and State of Wisconsin, have invented a new and useful Improvement in Saws; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

g This invention relates to the manner in which an upright or horizontal saw is made to saw circular forms, such as felloes for Wagon-wheels. or other circular bodies, staves for barrels, and all work of that description; and the invention consists in forming the blade of the saw concave, so as to suit the circle to be sawed.

Figure l represents a side view of a saw-blade, which, in this view, appears the same as an ordinary straight saw-blade.

Figure 2 represents the blade in cross-section, as through the line y y of iig. 1, and formed slightly concave.

Figure 3 represents another cross-section, the blade being formed more concave, as When the saw is designed to saw smaller circles.

Similar letters of reference indicate like parts.

These saws are placed in a gate or frame in the manner the same or similar to the ordinary mill-saw; and in sawing felloes or staves, or other workl of a similar nature, they may be placed in gangs, so that a number .of pieces may he sawed at the same time.

What I claim, and desire to secure by Letters Patent, is Forming a saw concave, substantially in the manner herein shown and described for the purposes speeed.

E. W. TILTON. Witnesses:

A. METZ, F. METZ. 

